condition mean min max ZT0-3 114.85 114.85 114.85 ZT4-7 9.7 9.7 9.7 ZT8-11 49.4 49.4 49.4 ZT12-15 20.55 20.55 20.55 ZT16-19 78.45 78.45 78.45 ZT20-23 86.35 86.35 86.35